@primary-color: #4285f4;
@font-family: 'Helvetica Neue', Arial, sans-serif;

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: @font-family;
}
body, html, #app {
  width: 100%;
  height: 100%;
}
.header {
  height: 60px;
  background: @primary-color;
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 20px;
}
// .sidebar {
//   width: 240px;
//   background: #f1f3f4;
//   padding: 20px;
// }
.main {
  flex: 1;
  background: #fff;
  padding: 20px;
  overflow-y: auto;
}
.mail-list {
  list-style: none;
}
.mail-item {
  padding: 12px;
  border-bottom: 1px solid #e0e0e0;
  cursor: pointer;
}
.mail-item.unread {
  background: #e8f0fe;
}